Rain
Sain
Spin
Spun
Stun
Stub
Snub
Snob
Snow
How about taking a trip from WACO to NOME? (Besides those two cities’ names, no proper nouns need be used).
WACO
Taco
Taro
Tarn
Torn
Tore
Tome
NOME
GULF --> PORT
Gulf
Golf
Gold
mold
meld
melt
malt
mart
mare
pare
part
PORT
We need two more words, ShibbOleth!
NULL>VOID looks impossible to me, unless vaid or voin (or variants along that line) are words.
Since we’re still waiting on the newest two words, I decided to try out the Null Void one. Hmm…can proper names be used? If they can…and also giving leeway to the fact that hemorroids is also called 'roids then this is the closed I could come up with for NULL > VOID
Null
Full
Fuel
Feel
Reel
Real
Read
Reid
Raid
Roid
Void
If not, however, then yeah, I’d give up on this one too and probably label it impossible.
Gah! Again, I use a word there that could have been left out. I really need to learn to preview more often.
I’m tired of waiting - how about HARD to EASY?
Well, EASY is actually tough, because I think the only change is EASY>EASE, and I see nothing from EASE. However, I’ll give it my best shot… Oh, duh. BASE.
hard
hare
bare
base
ease
easy
If someone wants to try a five-letter (which does have a solution, I’ve done it myself) , HANGS>NOOSE (or LOOSe, if you prefer); otherwise, WISE>DUMB.
I’ll stick to 4 letters.
WISE
Wide
Bide
Bode
Lode
Lade
Lame
Lamp
Lump
Dump
DUMB
KEEP -> GIVE
Wise
Wire
Dire
Dime
Dame
Damp
Dump
Dumb
You can take a journey from LAOS to SIAM without using any proper nouns except those two country names.
LAOS
Laps
Saps
Sips
Sits
Sets
Seas
Seam
SIAM
FREE --> CELL
FREE
fret
feet
feel
fell
CELL
When the nobilility were mentioned, didn’t we miss the DUKE of EARL?
DUKE
dike
dire
dare
pare
pars
ears
EARL
RITE to WONG? (sorry, sorry… 
)
rite
rate
late
lane
lone
long
wong
left —> shoe
LEFT
Loft
Loot
Soot
Shot
SHOE
ARIA --> SONG
ARIA
arid
grid
grin
gain
lain
loin
coin
conn
cone
bone
bong
SONG
EXIT>LANE
exit
emit
omit
smit
smut
shut
shot
soot
sort
sore
lore
lone
lane
BLUE —> FISH
Since my simulpost left Kat’s challenge unanswered:
Keep
Keel
Heel
Heed
Herd
Here
Mere
Mire
Dire
Dive
Give
Still up: BLUE --> FISH
BLUE --> FISH
BLUE
glue
glum
slum
slim
slam
seam
seat
feat
fest
fist
FISH
FLEW>NEST